Risk Region and Risk Impact

Risk Region

This section displays the assigned rankings for each risk, which are then multiplied to calculate the Risk Priority Number (RPN). The RPN determines the risk's classification within specific regions based on the calculated value.

The Risk Priority Number (RPN) serves as a key indicator for identifying areas where process functionality and end-users are most exposed to potential hazards. The RPN regions classification is as follows:

Acceptable Region

Represents minimal risk with negligible effects, where the combined factors of severity, occurrence, and detectability result in an overall low-risk classification. Risks in this category do not require mandatory design re-evaluation or corrective actions. Functionalities within this region are classified as harmless and pose no significant concern.

Tolerable Region

Represents a medium risk level, also known as As Low As Reasonably Practical (ALARP). Re-evaluating and improving the design is recommended but not mandatory. Risks in this region are classified as practical functionalities, indicating that they can be accepted with proper monitoring.

Unacceptable Region

Identifies an intolerable risk where the combined factors of severity, occurrence, and detectability result in the highest overall risk classification. Risks in this region require immediate intervention, re-evaluation, and potential design modifications. Preventive and corrective actions must be considered. Functionalities associated with this risk level are classified as intolerable and may result in permanent impairment.

Risk Impact

The risk impact is determined based on the assigned risk region. It is categorized into three levels according to the importance and priority of mitigation:

• Low (Acceptable): Minimal impact, negligible effects on operations or stakeholders.

• Medium (Tolerable): Moderate impact, requiring evaluation but not necessarily corrective action.

• High (Unacceptable): Critical impact, posing a significant threat that requires immediate attention.

Each impact level is predefined in the Risk Assessment Type Definition, ensuring consistency in evaluation. The impact can range from catastrophic consequences to a minor inconvenience, depending on the defined criteria and its effect on the company, project, or stakeholders.